¹⁷ and take ^(A)the helmet of salvation, and ^(B)the sword of the Spirit, which is the word of God,

Warning Against Apostasy

¹¹ About this we have much to say, and it is ^(A)hard to explain, since you have become dull of hearing. ¹² For though by this time you ought to be teachers, you need someone to teach you again ^(B)the basic principles of the oracles of God. You need ^(C)milk, not solid food, ¹³ for everyone who lives on milk is unskilled in the word of righteousness, since he is ^(D)a child. ¹⁴ But solid food is for ^(E)the mature, for those who have their powers ^(F)of discernment trained by constant practice to distinguish good from evil.